Question

10 by 20 - 20 by 40 by 460​

Answer 1

Step-by-step explanation:

$\frac{10}{20} - (\frac{20}{40}) \div 460$

$= \frac{1}{2} - \frac{ \frac{1}{2} }{460}$

$= \frac{1}{2} - \frac{1}{2 \times 460}$

$= \frac{1}{2} (1 - \frac{1}{460} )$

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